Contacting or Toroidal Conductivity sensor
- AE
- 3 days ago
- 1 min read
Advantage Europe offers both the contacting conductivity sensor and the toroidal conductivity sensor. But which one do you need?
Conductivity is on of the most commonly used parameter to measure water quality in industrial cooling and heating circuits.
Choosing which conductivity sensor you need, depends on the application.
For standard industrial process water, cooling water, RO water, potable water or heating water, the contacting conductivity sensor is mostly used. The contacting conductivity sensor has two electrodes in direct contact with the water. This sensor is the best solution for non-abrasive/non-aggressive water. It offers great accuracy in the low to medium conductivity range (0.05 µS/cm up to 200 mS/cm).
Advantage Europe offers contacting conductivity sensors for standard/cooling processes, boiler systems and RO systems.
When the media contains a higher concentration of chemicals, or abrasive/sticking particles, the electrodes from the contacting conductivity sensor could form a possible weak point. The electrodes can be in graphite or stainless steel. When these can be covered / damaged by the media, it is necessary to switch to a toroidal conductivity probe.
The toroidal conductivity sensor has no metal electrodes in contact with the liquid. It has two coils, which are covered in plastic. One coil induces an alternating current in the liquid, which the other coil detects.
This makes the toroidal sensor less dependable from the media specifications.
On the other hand, the toroidal sensor has a lower accuracy in the lower range conductivity, is more expensive and requires a larger tee for inline mounting.
